When it comes to AAA games or any high-profile videogame releases, there is always a big push to get you to buy it on day 1. Pre-orders and pure hype are pretty much the lifeblood of the industry by now. And Cyberpunk 2077 is proof that you can just sell a lie. As long as you have big enough marketing, people will literally buy a game that does not exist yet.
The games as a service model or multiplayer-focused games are somewhat of an exception. The GaaS model focuses on updates, tweaks, and new content. It is only natural that half a year after release, games with this model will have more content. It is expected. And multiplayer games tend to be most active at launch. So there is a time window where you do not have to think if a game is dead or not.
There is an argument to be made here, that good multiplayer games do not die that fast. But Dark Souls, or heck even more recent, the Demon’s Souls remake, are types of games you need to consider. The optional PVP is great! If you are into that sort of thing. But this is primarily a single-player experience. So the PVP scene died within half a year post-launch..